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Discoblog

Archive for November, 2008

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DNA Test Solves the Mystery of Copernicus’s Remains

copernicusThe remains of an elderly man found in a Polish cathedral in 2005 have now been confirmed to be that of Copernicus, the 16th century astronomer famous for displacing Earth from the center of the universe. A team of Polish researchers have matched DNA extracted from a tooth and a femur bone to that of a strand of hair found in one of Copernicus’ old books.

For all his revolutionary ideas, Copernicus was never particularly famous during his lifetime, at least not enough to have a marked grave. (He didn’t publish his heliocentric treatise De revolutionibus until 1543, the year of his death, for fear of persecution.) Scientists knew he was one of the anonymous burials in a cathedral in Frombork, Poland, but they didn’t know which one. So they used radar to scan all the bodies to find one about 60 to 70 years old, the astronomer’s age when he died. The DNA evidence confirms that they got the right body.

(more…)

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November 20th, 2008 Tags: burial, Copernicus, death, DNA
by Nina Bai in Diseases, Injuries, & Other Ailments, Space & Aliens Therefrom | 19 Comments | RSS feed | Trackback >

To Fight Croc-Killing Toads, Australians Turn to “Cane Toad Golf”

toadRemember the doomed, cane-toad-eating crocodiles? Well they’re still eating, and dying: A new report suggests that as much as 77 percent of the crocodile population along the Victoria River has now perished from toad poisoning.

In yet another example of the “solution to one problem becomes an even bigger problem” doctrine, cane toads were purposely introduced to the region as a pest-control measure for beetles in the sugar cane fields. But sure enough, the toads soon became pests themselves, to the point where volunteer groups are trying to stop the toads’ spread across the continent.

One community has been promoting “cane toad golf”—basically whacking the toads with golf clubs. A more humane way, experts suggest, is to put the toads in the fridge until they’re numb and then transfer them to the freezer to kill them.

(more…)

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November 20th, 2008 Tags: Australia, crocodiles, poison, toads
by Nina Bai in The Wide (& Strange) World of Animals | 11 Comments | RSS feed | Trackback >

Brazil to Locate “Lost Tribes” By Their Body Heat

flyoverThe fuzzy photos of a “lost tribe” in the Amazon released in May turned out to be somewhat of a hoax—the government had known about the tribe for decades—but they raised a real question: How do you protect uncontacted tribes without, well, contacting them? To answer this, the Brazilian government has come up with a way to track the tribes from a distance, using high-altitude planes equipped with body-heat sensors.

The “lost tribe” photos were released by Funai, a group dedicated to protecting isolated people from land encroachment by loggers and farmers. Antenor Vaz, the head of Funai, says the body-heat sensors will allow the government to identify tribal territories without exposing the tribes to Western infectious diseases. The government can then set up protected areas and leave them in peace. The Brazilian constitution stipulates that all Indian ancestral lands must be turned over the tribes; currently, about 11 percent of Brazil technically belong to Indian tribes.

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November 19th, 2008 Tags: Brazil, indegenous people
by Nina Bai in Technology Attacks!, Where We Came From & Where We're Going | 3 Comments | RSS feed | Trackback >

It’s a Furby, It’s a Gremlin, It’s…a Pygmy Tarsier!

tarsierFurbies, those annoying furry robots that were all the rage in the late nineties, are back. But this time they’re alive. In the past few months, scientists have captured three live Furby lookalikes—called pygmy tarsiers (Tarsius pumilus)—in Indonesian forests. Pygmy tarsiers are tiny nocturnal primates, less than four inches long, with giant eyes and long thin fingers tipped with claws.

Until now, the gremlin-like creatures were almost mystical. The last time a pygmy tarsier was found alive was in 1930. Many scientists were convinced that the species was extinct until Indonesian scientists found one dead in a mouse trap in 2000. Determined to track down the mysterious species, a team of primatologists set up 276 mist nets in the mountains of Indonesia. They captured three, two males and one female, and fitted them with radio collars.

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November 19th, 2008 Tags: pygmy tarsier
by Nina Bai in The Wide (& Strange) World of Animals | 7 Comments | RSS feed | Trackback >

Art in Space: Painting Created in Zero Gravity Sells for a Small Fortune


homage-to-francis-bacon-triptych-1-1-c-nasser-azam-2008.jpgBritish artist Nasser Azam had a unique desire: to create a piece of art in zero G (the feeling of weightlessness). Not only did his plan become a reality, but it was a profitable one: On Friday, November 14th, the painting sold for $332,500 at Phillips de Pury’s Contemporary Art Part II auction in New York.

To create his zero-gravity masterpiece, Azam and two other artists flew 23,000 feet into the air aboard an ILYUSHIN 76 MDK parabolic aircraft. Nicknamed the “vomit comet” ride, the parabolic flight made everyone lose their breakfast, except for Azam.

The so-called “Life in Space” project required training at the Russian cosmonaut facility Star City. But what Azam had to consider most was how losing gravity would affect his ability to paint. First, Azam drew disembodied figures inspired by Francis Bacon while he was still on the ground. Then while in space, Azam filled in the pre-drawn figures using acrylic paint. But he had to do any finishing touches with oil pastels. Otherwise, the paint would have floated in the air.

To watch Azam in action, click here.
Or to see the artwork, click here.

Image of Nasser Azam’s Homage to Francis Bacon: Triptych I courtesy of Comlan Getty

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November 18th, 2008 Tags: art, gravity, space
by Boonsri Dickinson in Space & Aliens Therefrom | 23 Comments | RSS feed | Trackback >

Do Women Prefer a Scarred Face? Yes, But Not for Long.

faceWhat do John McCain, Seal, and Harry Potter have in common? Facial scars and, according to a new study, an advantage in attracting women—but only for a fling. Researchers from the University of Liverpool report that women prefer men with facial scars as short-term partners over men without facial scars. For long-term relationships, however, scars don’t make a difference.

The researchers came to this conclusion after showing 147 women images of men’s faces with mild scarring or without, and asking the women to rate the men as potential short-term or long-term mates. Previous research has shown that women prefer men with square jaws and well-defined brow ridges for short-term mates and more feminine facial features for long-term mates. The researchers offer an explanation for their new results in the press release:

“Women may have rated scarring as an attractive quality for short-term relationships because they found it be a symbol of masculinity, a feature that is linked to high testosterone levels and an indicator of good genetic qualities that can be passed on to offspring. Men without scars, however, could be seen as more caring and therefore more suitable for long-term relationships.”

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November 18th, 2008 Tags: face, relationships, scars
by Nina Bai in Sex & Mating | 5 Comments | RSS feed | Trackback >

Whale Shark Poops on Camera; Scientists Rejoice

whale sharkYou might think these scientists were potty training this whale shark based on their level of excitement when the giant fish (the world’s largest) finally had a bowel movement. The scientists, like some proud parents, even captured the moment on film. Researcher Mark Meekan described the rare poop, which he collected and stored in tiny vials, as “scientific gold” for the clues it would contain about the shark’s diet.

The researchers are studying the whale shark (Rhinsodon typus), a gentle cousin of the great white shark, to learn about the species’ mysterious feeding habits and migration patterns. DNA analysis of the poop confirmed that whale sharks, which can grow up to 12 meters long, sustain themselves on tiny red crab larvae. This also explains why they travel to Christmas Island, just south of Indonesia, where millions of red crabs spawn each year.

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November 17th, 2008 Tags: feces, fish, whale shark
by Nina Bai in Scat-egory, The Ocean & All Its (Endangered) Wonders | 7 Comments | RSS feed | Trackback >

To Fight Cancer, Ovarian Cells Eat Themselves

cannibalSome cells take the mantra “you are what you eat” quite literally. In a process known as autophagy, cells form internal sacs of digestive enzymes—like extra stomachs—and cannibalize parts of themselves. This usually occurs in times of starvation when a cell needs to recycle bits of itself or get rid of intracellular pathogens. But new research shows that cellular self-cannibalization can also play a role in fighting cancer.

Researchers at the University of Texas M.D. Anderson Cancer Center found that a protein, PEA-15, affects the rate at which ovarian cancer cells self-cannibalize through autophagy. PEA-15 induces cancer cells to form digestive sacs, known as lysosomes, and eat themselves from the inside. That’s not just Hannibal Lecter cannibalism—it’s like Lecter chewing on his own arm.

(more…)

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November 17th, 2008 Tags: cancer, cannibalism, cells
by Nina Bai in Diseases, Injuries, & Other Ailments | 3 Comments | RSS feed | Trackback >

Weekly Science Blog Roundup

Yee-haw! It’s the blog roundup.• Spiders in space! Seven orb-weaver spiders are making their way to the International Space Station.

• How to make water drops bounce. Watch all the jiggly action in slow motion.

• Doesn’t matter which direction the Raid is coming from: Scientists studying cockroach escape strategies conclude the little buggers choose their paths randomly (unlike flies).

(more…)

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November 14th, 2008 Tags: cockroaches, space, spiders
by Nina Bai in Blog Roundup, Physics & Math. ’Nuff Said., Space & Aliens Therefrom, Technology Attacks!, The Wide (& Strange) World of Animals | No comments | RSS feed | Trackback >

Crime-Fighting Polymer Reads Letters in Sealed Envelopes

letterLook for this in a future episode of CSI: Detectives expose a piece of paper, a shard of glass, or even a scrap of fabric to a chemical vapor, and within hours, dark brown fingerprints appear. Scientists in the UK report a new method of fingerprint detection that makes fingerprints on almost any material visible to the naked eye. But that’s not all: They say the same method can also read a sealed letter without opening the envelope.

Researcher Paul Kelly stumbled upon the discovery while studying the compound disulfur dinitride. His team first noticed the compound’s fingerprint imaging properties on laboratory glassware. When exposed to vapors of the compound, even in low concentrations, fingerprints left on the glassware would stain a dark brown. Residues from the fingerprints were causing disulfur dinitride to form a dark brown polymer.

(more…)

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November 14th, 2008 Tags: crime, fingerprints, forensics
by Nina Bai in Crime & Punishment | No comments | RSS feed | Trackback >

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